Make x the subject of the formula

What is the vertex form of f(x) = x2 + 6x + 3

Come up with a new linear function that has a slope that falls in the range 10 m − < < . choose two different initial values. for this new linear function, what happens to the function’s values after many iterations? are the function’s values getting close to a particular number in each case?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15